Welford, W. T. <br/><br/>
Geometrical optics :  optical instrumentation / 
W.T. Welford. 
 - Amsterdam :  North-Holland Pub. Co.,  1962. 
 - x, 200 p. :  ill. ;  23 cm. 
 - Undergraduate textbooks in physics. .
<br/><br/> Includes index. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geometrical optics.<br/>Optical instruments.